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platform/mbed_wait_api_rtos.cpp
- Committer:
- amithy
- Date:
- 2017-11-09
- Revision:
- 178:c26431f84b0d
- Parent:
- 151:5eaa88a5bcc7
- Child:
- 160:d5399cc887bb
File content as of revision 178:c26431f84b0d:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ // This implementation of the wait functions will be compiled only // if the RTOS is present. #ifdef MBED_CONF_RTOS_PRESENT #include "platform/wait_api.h" #include "hal/us_ticker_api.h" #include "rtos/rtos.h" #include "platform/critical.h" void wait(float s) { wait_us(s * 1000000.0f); } void wait_ms(int ms) { wait_us(ms * 1000); } void wait_us(int us) { uint32_t start = us_ticker_read(); // Use the RTOS to wait for millisecond delays if possible int ms = us / 1000; if ((ms > 0) && core_util_are_interrupts_enabled()) { Thread::wait((uint32_t)ms); } // Use busy waiting for sub-millisecond delays, or for the whole // interval if interrupts are not enabled while ((us_ticker_read() - start) < (uint32_t)us); } #endif // #if MBED_CONF_RTOS_PRESENT